Tool-chuck.



No 852.320. PATENTED APR. 30, 1907.,

' T. A. DIOKS.

TOOL CHUCK.

APPLIOATION FILED 1mm 1a, 1906.

MQQMYQQMA QM ing my invention; Fig. 2 is THOMAS A. DIOKS HALF TO WVILLIAM HENRY OF WILKINSBURG, PE

MACK, OF WILKINSBURG, PENNSYLVANIA.

N N SYLVAN 1A, ASSIGN OR OF ON E- TOOL-CHUCK- Specification of Letters Patent.

Patented April 30, 1907.

Application filed June 13,1906- Serial No 321,502.

To M7 w/wn'z, it may concern:

Be it known that lvllkinsburg, ma, have I, THOMAS A. DICKS, of Allegheny county, Pennsylvainvented a new and useful Improvement in Tool-Chucks, of which the following is reierence drawings a full, clear, and exact description, being had to the accompanying iorming part oi th1s specification,

in which Figure 1 is a side view of a chuck embodya central longitudinal section of the same; Fig. 3 is a section on the line III-III of Fig. 1 Fig. i. is a similar section showing a modification; section 011 the line V-V oi Fig. 2

jaws rem the chuck jaws; Fig. 7 is a Fig. 5 is a with the oved; Fig. 6 is a plan view of one of partial section on the line VIIVII of Fig. 2.

My invention is designed to provide a tool chuck which is particularly designed for use with heavy and high speed tools, the object which is .of my invention being to provide a chuck simple and positive in its action,

which can be readily adjusted to receive and release tl reducing age in hig 1e tool, and in which the gripping ate and guided as to be largely the strain of the tool, thereby to a minimum the danger of break- 'h speed and heavy work.

Other objects and advantages of my invent1on will hereinafter appear.

In the meral 2 which is to receive the inner accompanying drawings, the nudesignates the head of the chuck, 'fOl'li'lBCl with the slots or recesses 3 end portions of the sliciing jaws 4.

1s a fixed cap or shell which is rigidly secured to the head 2 by means oi a belt or pin 6, or in any other suitable manner.

portion 5 smaller d or groove tions 4& of the jaws 4. recesses 3 The end of the cap or shell is tapered to a iameter and is formed with recesses s 7 to receive and guide the end por- The bottoms of the and the bottoms of the recesses 7 have beveled parallel surfaces upon which the jaws mg ring end of th the end of the head 2. with a t move, being actuated by the adjust- 8 which is seated between the inner e shell 5 with a flange 8 embracing shell, and a shoulder 2 of the The inner face of this ring is formed hread 9 to engage the segmental threads 10 on the ends of the jaws 4. By rotating the ring 8, the jaws 4 are advanced or retracted to clamp and release the shank of the tool.

The clamping lace oi the jaws 4 may be of any desired form such as the well known V form shown in l ig. 4'. I prefer, however, to I make them of the convex form shown at 1 1 in Fig. 3, to fit a corresponding concavity in the shank of the tool. This convex form is preferred for the reason that it is much easier to sha e accurately, as is also the concave shape of t ie corresponding depression in the tool shank. It is also better for high speed and heavy tools, as it is stronger, there being no thin edges to give a starting point for fractures such as exist in the V-iorm.

It will he noted that by means of the eonstruction described, an opening for the tool is I provided in the chuck oi the full inner diam- I l j I I eter oi the shell 5, thereby admitting the use oi a larger and stronger shank on the tools. By partially seating the aws within the recesses 7 of the shell 5, these jaws are securely supported by the walls of such grooves, and are thereby relieved ol' the twisting and wrenching strains imparted to them by the tools.

A further advantage of the construction consists in the fact that the jaws are actuated and guided in such a manner as to cause them to at all times properly center the tool.

Various changes may be made in the details of construct-ion and arrangement oi the parts by those skilled in the art without departing from the spirit and scope of my invention, since Vhat I claim is i 1. A tool chuck having a head, a shell fixed to said head and extending forwardly beyond the same, and longitudinal ly-movable clamping jaws seated at one end portion in guides or grooves of the head, and at the opposite I end portion in guides or grooves of the shell;

substantially as described.

2. A tool chuck having a longitudinall I movable jaw and a iixed surrounding shell j having a groove which receives and guides I the outer ed ge portion of the jaw, together :00

3. A tool chuck having jaws fitting at their In testimony whereof, I have hereunto set outer edges in grooves of the chuck shell, and my hand.

having their inner faces shaped to fit into grooves of a tool shank, WheIeby both the in- THOMAS DICKS' 5 ner and outer edges of the jaws are support- Witnesses:

ed against torsional strains; substantially as H. M. CORWIN,

described. GEO. H. PARME'LEE. 

